ATE130453T1 - Dünnfilm-vorrichtung zur rotationsleitung von magnetischem fluss. - Google Patents

Dünnfilm-vorrichtung zur rotationsleitung von magnetischem fluss.

Info

Publication number
ATE130453T1
ATE130453T1 AT90305150T AT90305150T ATE130453T1 AT E130453 T1 ATE130453 T1 AT E130453T1 AT 90305150 T AT90305150 T AT 90305150T AT 90305150 T AT90305150 T AT 90305150T AT E130453 T1 ATE130453 T1 AT E130453T1
Authority
AT
Austria
Prior art keywords
thin film
flux
film device
magnetic flow
conduction
Prior art date
Application number
AT90305150T
Other languages
English (en)
Inventor
Michael L Mallary
Original Assignee
Quantum Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Quantum Corp filed Critical Quantum Corp
Application granted granted Critical
Publication of ATE130453T1 publication Critical patent/ATE130453T1/de

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R33/00—Arrangements or instruments for measuring magnetic variables
    • G01R33/02—Measuring direction or magnitude of magnetic fields or magnetic flux
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y25/00—Nanomagnetism, e.g. magnetoimpedance, anisotropic magnetoresistance, giant magnetoresistance or tunneling magnetoresistance
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B82—NANOTECHNOLOGY
    • B82Y—SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES
    • B82Y40/00—Manufacture or treatment of nanostructures
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109—Details
    • G11B5/3113—Details for improving the magnetic domain structure or avoiding the formation or displacement of undesirable magnetic domains
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109—Details
    • G11B5/313—Disposition of layers
    • G11B5/3143—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109—Details
    • G11B5/313—Disposition of layers
    • G11B5/3143—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding
    • G11B5/3146—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding magnetic layers
    • G11B5/3153—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding magnetic layers including at least one magnetic thin film coupled by interfacing to the basic magnetic thin film structure
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3109—Details
    • G11B5/313—Disposition of layers
    • G11B5/3143—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding
    • G11B5/3146—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding magnetic layers
    • G11B5/3153—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding magnetic layers including at least one magnetic thin film coupled by interfacing to the basic magnetic thin film structure
    • G11B5/3156—Disposition of layers including additional layers for improving the electromagnetic transducing properties of the basic structure, e.g. for flux coupling, guiding or shielding magnetic layers including at least one magnetic thin film coupled by interfacing to the basic magnetic thin film structure providing interaction by induced or exchange coupling
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/31—Structure or manufacture of heads, e.g. inductive using thin films
    • G11B5/3176—Structure of heads comprising at least in the transducing gap regions two magnetic thin films disposed respectively at both sides of the gaps
    • G11B5/3179—Structure of heads comprising at least in the transducing gap regions two magnetic thin films disposed respectively at both sides of the gaps the films being mainly disposed in parallel planes
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/127—Structure or manufacture of heads, e.g. inductive
    • G11B5/33—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only
    • G11B5/332—Structure or manufacture of flux-sensitive heads, i.e. for reproduction only; Combination of such heads with means for recording or erasing only using thin films
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • G11B5/62—Record carriers characterised by the selection of the material
    • G11B5/64—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent
    • G11B5/66—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers
    • G11B5/674—Record carriers characterised by the selection of the material comprising only the magnetic material without bonding agent the record carriers consisting of several layers having differing macroscopic or microscopic structures, e.g. differing crystalline lattices, varying atomic structures or differing roughnesses
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
    • G11C11/14—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using thin-film elements
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11C—STATIC STORES
    • G11C11/00—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor
    • G11C11/02—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements
    • G11C11/14—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using thin-film elements
    • G11C11/15—Digital stores characterised by the use of particular electric or magnetic storage elements; Storage elements therefor using magnetic elements using thin-film elements using multiple magnetic layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/26—Thin magnetic films, e.g. of one-domain structure characterised by the substrate or intermediate layers
    • H01F10/30—Thin magnetic films, e.g. of one-domain structure characterised by the substrate or intermediate layers characterised by the composition of the intermediate layers, e.g. seed, buffer, template, diffusion preventing, cap layers
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F10/00—Thin magnetic films, e.g. of one-domain structure
    • H01F10/32—Spin-exchange-coupled multilayers, e.g. nanostructured superlattices
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/24—Magnetic cores
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
    • H01F27/36—Electric or magnetic shields or screens
    • H01F27/366—Electric or magnetic shields or screens made of ferromagnetic material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
    • H01F41/14—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates
    • H01F41/30—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates for applying nanostructures, e.g. by molecular beam epitaxy [MBE]
    • H01F41/302—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for applying magnetic films to substrates for applying nanostructures, e.g. by molecular beam epitaxy [MBE] for applying spin-exchange-coupled multilayers, e.g. nanostructured superlattices
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/90—Magnetic feature
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S428/00—Stock material or miscellaneous articles
    • Y10S428/922—Static electricity metal bleed-off metallic stock
    • Y10S428/9265—Special properties
    • Y10S428/928—Magnetic property
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/11—Magnetic recording head
    • Y10T428/1171—Magnetic recording head with defined laminate structural detail
    • Y10T428/1186—Magnetic recording head with defined laminate structural detail with head pole component
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/26—Web or sheet containing structurally defined element or component, the element or component having a specified physical dimension
    • Y10T428/263—Coating layer not in excess of 5 mils thick or equivalent
    • Y10T428/264—Up to 3 mils
    • Y10T428/265—1 mil or less
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Nanotechnology (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Electromagnetism (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • General Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • Spectroscopy & Molecular Physics (AREA)
  • Magnetic Heads (AREA)
  • Thin Magnetic Films (AREA)
  • Physical Vapour Deposition (AREA)
  • Electric Connection Of Electric Components To Printed Circuits (AREA)
  • Printers Or Recording Devices Using Electromagnetic And Radiation Means (AREA)
AT90305150T 1989-06-02 1990-05-14 Dünnfilm-vorrichtung zur rotationsleitung von magnetischem fluss. ATE130453T1 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US07/360,421 US5085935A (en) 1988-08-03 1989-06-02 Flux spreading thin film magnetic devices

Publications (1)

Publication Number Publication Date
ATE130453T1 true ATE130453T1 (de) 1995-12-15

Family

ID=23417889

Family Applications (1)

Application Number Title Priority Date Filing Date
AT90305150T ATE130453T1 (de) 1989-06-02 1990-05-14 Dünnfilm-vorrichtung zur rotationsleitung von magnetischem fluss.

Country Status (6)

Country Link
US (1) US5085935A (de)
EP (2) EP0620573B1 (de)
JP (1) JPH07105005B2 (de)
AT (1) ATE130453T1 (de)
CA (1) CA2015156C (de)
DE (2) DE69033307T2 (de)

Families Citing this family (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5195005A (en) * 1989-06-02 1993-03-16 Digital Equipment Corporation Tranducer with improved inductive coupling
US5184267A (en) * 1989-06-02 1993-02-02 Digital Equipment Corporation Transducer with improved inductive coupling
US5311386A (en) * 1989-06-02 1994-05-10 Digital Equipment Corporation Transducer with improved inductive coupling
US5428893A (en) * 1989-06-02 1995-07-04 Quantum Corporation Method of making a transducer with improved inductive coupling
US5208715A (en) * 1990-08-31 1993-05-04 Seagate Technology, Inc. Shield geometry for stabilizing magnetic domain structure in a magnetoresistive head
US5187628A (en) * 1990-10-12 1993-02-16 Fujitsu Limited Thin film magnetic head having magnetic anisotropy with in-plane and perpendicular components
JPH04362505A (ja) * 1991-02-27 1992-12-15 Internatl Business Mach Corp <Ibm> 薄膜磁気読み出し／書き込みヘッド及び磁気記録システム
DE4442682C2 (de) * 1994-11-30 1997-12-18 Bogen Electronic Gmbh Kodierkopf zum Magnetisieren von Schichten
US6510031B1 (en) 1995-03-31 2003-01-21 International Business Machines Corporation Magnetoresistive sensor with magnetostatic coupling to obtain opposite alignment of magnetic regions
US5703740A (en) * 1995-08-24 1997-12-30 Velocidata, Inc. Toroidal thin film head
JPH10149513A (ja) * 1996-11-15 1998-06-02 Nec Corp 磁気抵抗効果型複合ヘッド
US5982177A (en) * 1997-08-08 1999-11-09 Florida State University Magnetoresistive sensor magnetically biased in a region spaced from a sensing region
US6222702B1 (en) 1997-08-15 2001-04-24 Seagate Technology, Inc. Magnetic read element shield having dimensions that minimize domain wall movement
JP2000020916A (ja) * 1998-07-01 2000-01-21 Hitachi Ltd 誘導型薄膜磁気ヘッド
US6191917B1 (en) 1998-09-10 2001-02-20 Storage Technology Corporation Thin film tape write head for dual frequency operation
US6169646B1 (en) 1998-11-18 2001-01-02 Seagate Technology, Inc. Magnetoresistive shield incorporating seedlayer for anisotropy enhancement
US6097578A (en) * 1998-12-02 2000-08-01 Seagate Technology, Inc. Bottom shield design for magnetic read heads
JP2000339635A (ja) * 1999-05-31 2000-12-08 Toshiba Corp 磁気ヘッド及び磁気記録再生装置
FR2905792A1 (fr) * 2006-09-11 2008-03-14 Commissariat Energie Atomique Circuit magnetique ferme pour applications dynamiques a haute frequence et procede de realisation d'un tel circuit magnetique.
US8259411B2 (en) * 2008-05-07 2012-09-04 Seagate Technology Llc Fabrication of trapezoidal pole for magnetic recording
US9958511B2 (en) 2014-12-08 2018-05-01 Infineon Technologies Ag Soft switching of magnetization in a magnetoresistive sensor
US10622848B2 (en) * 2016-04-11 2020-04-14 Persimmon Technologies, Corp. Material with directional microstructure

Family Cites Families (49)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3880602A (en) * 1967-07-28 1975-04-29 Centre Nat Rech Scient Thin layer magnetic structures for binary information stores
US3549825A (en) * 1967-09-18 1970-12-22 Ncr Co Magnetic transducer with planar spiral coil extending into the gap
US3961299A (en) * 1969-10-28 1976-06-01 Commissariat A L'energie Atomique Magnetic circuit having low reluctance
US3665431A (en) * 1970-06-25 1972-05-23 Ibm Magneto-optic transducer
US3967368A (en) * 1972-10-11 1976-07-06 International Business Machines Corporation Method for manufacturing and using an internally biased magnetoresistive magnetic transducer
GB1440343A (en) * 1973-04-13 1976-06-23 Data Recording Instr Co Magnetic core and coil assemblies
FR2248566B1 (de) * 1973-10-23 1976-11-19 Cii
JPS52131711A (en) * 1976-04-28 1977-11-04 Kokusai Denshin Denwa Co Ltd Thin film magnetic head
US4103315A (en) * 1977-06-24 1978-07-25 International Business Machines Corporation Antiferromagnetic-ferromagnetic exchange bias films
JPS5459915A (en) * 1977-10-20 1979-05-15 Sony Corp Method and apparatus for reading of magnetic recording signal
US4165525A (en) * 1978-02-15 1979-08-21 U.S. Philips Corporation Magnetic head having a core provided on a substrate by means of thin-film technology
JPS5584016A (en) * 1978-12-19 1980-06-24 Sony Corp Magnetic head and its manufacture
US4335410A (en) * 1979-01-15 1982-06-15 Magnex Corporation Thin film magnetic transducer
US4242710A (en) * 1979-01-29 1980-12-30 International Business Machines Corporation Thin film head having negative magnetostriction
US4374403A (en) * 1979-06-27 1983-02-15 Matsushita Electric Industrial Co., Ltd. Magnetic recording and reproducing system
US4413296A (en) * 1979-07-16 1983-11-01 Eastman Kodak Company Thin film magnetoresistive head
JPS56163517A (en) * 1980-05-19 1981-12-16 Fujitsu Ltd Vertical magnetization recording head
US4356523A (en) * 1980-06-09 1982-10-26 Ampex Corporation Narrow track magnetoresistive transducer assembly
JPS57141013A (en) * 1981-02-25 1982-09-01 Canon Electronics Inc Thin film magnetic sensor
JPS57164416A (en) * 1981-03-31 1982-10-09 Fujitsu Ltd Magnetic head
NL8200481A (nl) * 1982-02-09 1983-09-01 Philips Nv Magneetkop.
DE3374622D1 (en) * 1982-04-14 1987-12-23 Matsushita Electric Ind Co Ltd A playback head for perpendicular magnetic recordings
NL192546C (nl) * 1982-07-19 1997-09-02 Nippon Telegraph & Telephone Leeskop voor een met hoge dichtheid uitgevoerde magnetische registratie.
US4566050A (en) * 1982-12-30 1986-01-21 International Business Machines Corp. (Ibm) Skew insensitive magnetic read head
US4535375A (en) * 1983-01-14 1985-08-13 Magnetic Peripherals, Inc. Magnetoresistive head
JPH061729B2 (ja) * 1983-01-17 1994-01-05 株式会社日立製作所 磁性体膜およびそれを用いた磁気ヘッド
JPH0622170B2 (ja) * 1983-12-16 1994-03-23 株式会社日立製作所 磁気ヘッド
DE3346876A1 (de) * 1983-12-23 1985-07-11 Siemens AG, 1000 Berlin und 8000 München Kombinierter schreib- und lese-magnetkopf zur senkrechten magnetisierung eines entsprechenden aufzeichnungsmediums
US4626946A (en) * 1984-02-28 1986-12-02 International Business Machines Corporation Twin track vertical read-write head structure
JPS60223043A (ja) * 1984-04-20 1985-11-07 Nippon Telegr & Teleph Corp <Ntt> マイクロ磁気ヘツド
EP0186032B1 (de) * 1984-12-21 1989-05-24 Siemens Aktiengesellschaft Dünnfilm-Magnetkopf für ein senkrecht zu magnetisierendes Aufzeichnungsmedium
US4656546A (en) * 1985-01-22 1987-04-07 Digital Equipment Corporation Vertical magnetic recording arrangement
JPS61192011A (ja) * 1985-02-20 1986-08-26 Hitachi Ltd 薄膜磁気ヘツド
US4668913A (en) * 1985-03-14 1987-05-26 International Business Machines Corporation Constant flux magneto resistive magnetic reluctance sensing apparatus
JPH069083B2 (ja) * 1985-04-04 1994-02-02 日本電気株式会社 垂直磁気ヘッド
US4649447A (en) * 1985-08-15 1987-03-10 International Business Machines Combed MR sensor
US4663685A (en) * 1985-08-15 1987-05-05 International Business Machines Magnetoresistive read transducer having patterned longitudinal bias
JPS6246418A (ja) * 1985-08-23 1987-02-28 Nippon Telegr & Teleph Corp <Ntt> バイアス印加型磁気ヘツド
US4698711A (en) * 1985-10-02 1987-10-06 International Business Machines Corporation Simplified, shielded twin-track read/write head structure
US4695351A (en) * 1986-07-10 1987-09-22 Digital Equipment Corporation Method for producing magnetic heads
US4803580A (en) * 1987-02-17 1989-02-07 Magnetic Peripherals Inc. Double-gap magnetoresistive head having an elongated central write/shield pole completely shielding the magnetoresistive sensor strip in the read gap
US4891725A (en) * 1987-02-17 1990-01-02 Magnetic Peripherals Inc. Magnetoresistive sensor having antiferromagnetic exchange-biased ends
US4825318A (en) * 1987-06-05 1989-04-25 Carnegie-Mellon University Compound read/write element for rigid magnetic disk files
US4816947A (en) * 1987-11-12 1989-03-28 International Business Machines Single track vertical and horizontal recording read/write head design
WO1989005505A1 (en) * 1987-12-04 1989-06-15 Digital Equipment Corporation Laminated poles for recording heads
US4912584A (en) * 1988-03-09 1990-03-27 Digital Equipment Corporation Method for fabricating magnetic recording poles
US4878140A (en) * 1988-06-21 1989-10-31 Hewlett-Packard Company Magneto-resistive sensor with opposing currents for reading perpendicularly recorded media
US5089334A (en) * 1988-08-03 1992-02-18 Digital Equipment Corporation Flux spreading thin film magnetic devices
CA1334447C (en) * 1988-08-03 1995-02-14 Digital Equipment Corporation Perpendicular anisotropy in thin film devices

Also Published As

Publication number Publication date
EP0620573B1 (de) 1999-09-29
EP0620573A2 (de) 1994-10-19
DE69033307D1 (de) 1999-11-04
JPH0349010A (ja) 1991-03-01
CA2015156C (en) 1994-08-02
DE69033307T2 (de) 2000-04-06
EP0401983A1 (de) 1990-12-12
EP0401983B1 (de) 1995-11-15
JPH07105005B2 (ja) 1995-11-13
DE69023548T2 (de) 1996-04-18
DE69023548D1 (de) 1995-12-21
CA2015156A1 (en) 1990-12-02
EP0620573A3 (de) 1995-04-05
US5085935A (en) 1992-02-04

Similar Documents

Publication Publication Date Title
ATE130453T1 (de) Dünnfilm-vorrichtung zur rotationsleitung von magnetischem fluss.
EP0353911A3 (de) Magnetische Dünnfilmvorrichtungen für Flussausbreitung
ATE35776T1 (de) Vorrichtung zur herstellung pulsierender magnetfelder fuer therapeutische zwecke.
FR2455330A1 (fr) Dispositif magnetique de transduction a magnetoresistances
JPS54157610A (en) Magnetic head
DE69024604D1 (de) Filmtransporteinrichtung mit magnetischer Informationsaufzeichnung
MY113192A (en) Magnetic field sensor
KR910005236A (ko) 박막 자기헤드
KR900015076A (ko) 자기 기록 매체
EP0353885A3 (de) Senkrechte Anisotropie in Dünnfilmvorrichtungen
KR880011738A (ko) 자기 기록매체
ATE77711T1 (de) Potentiometer bzw. veraenderbarer widerstand.
ES467766A1 (es) Dispositivo de lectura de informaciones magneticas.
KR910008656A (ko) 박막 자기 헤드
FR2743183B1 (fr) Dispositif d&#39;enregistrement a micropointe magnetoresistive
JPS558640A (en) Magnetic recording and reproducing system
KR910013090A (ko) 자기기록매체 및 그 제조방법
JPS57205827A (en) Manufacture of magnetic recording medium
GB1483775A (en) Information storage device
JPS6017466U (ja) 光磁界センサ
JPS5832409U (ja) 回転角検出装置
SU373764A1 (ru) Устройство для регистрации оптической информации
JPS5862307U (ja) 偏光板
Puchalska et al. Mechanism of bubble motion in implanted garnets
JPS5597020A (en) Thin-film magnetic head

Legal Events

Date Code Title Description
RER Ceased as to paragraph 5 lit. 3 law introducing patent treaties